What does @Slot() do? — Is the Slot decorator even necessary?
Qt::DirectConnection: If the signal and slot are in the same thread, the slot is called immediately after the signal is emitted.
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TDMA frame structure showing a data stream divided into frames and those frames divided into time slots. ... It allows several users to share the same frequency channel by dividing the signal into different time slots.
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Then to continue using Qt signals and slots with the no_keywords flag, simply replace all uses of the Qt moc keywords in your sources with the corresponding Qt macros Q_SIGNALS (or Q_SIGNAL), Q_SLOTS (or Q_SLOT), and Q_EMIT.
Chapter 6: Signals and Slots | Cross-Platform Development with Qt 6 and Modern C++
Chapter 6: Signals and Slots. A chapter from Cross-Platform Development with Qt 6 and Modern C++ by Nibedit Dey